For the Great Western Railway's second London terminus at Paddington (1850-1854) Brunel sought to apply some of the architectural lessons from the Crystal Palace to a more permanent structure. Aided by some from the team responsible for the exhibition building, notably the contractors Fox Henderson and the architect Matthew Digby Wyatt, he devised a triple-span arched roof, saved from the potential monotony of its immense length by the addition of two transepts.